>> the fbi now believes the death of a u.s. border patrol agent early tuesday morning near the the arizona mexican border may have been a case of friendly fire. 30-year-old nicholas ivie was fatally shot and another agent wounded. investigators are trying to determine if the men shot each other and the police say they were under hostile fire. the investigation was continuing. republican senators are urging defense contractors to ignore white house guidance about layoff notices to employees. the administration has told companies not to issue legally required advisories before the election, ignoring what's called the war act and requiring notification and the administration is also promised to cover any of the contractors legal costs if they're sued for not sending out those notices. and senators john mccain and lindsey graham say they will block any such reimbursements and that compliance with the law is not optional. the man who heads the firm shall accused of voting fraud, is defending his firm tonight. senior correspondent er